Test 6

Question 1

What property is used to predict whether a bond is primarily ionic or primarilybcovalent

Answer 1

Electrnegativity

Question 2

What is not a difference between compounds and mixtures

Answer 2

Compounds are always homogeneous, but mixtures are always heterogenous

Question 3

What causes the bright, colored lines in the spectrum of glowing hydrogen gas

Answer 3

Electrons dropping from higher to lower energy levels

Question 4

What does absolute zero equal

Answer 4

0 K and -273.15°C

Question 5

What is a he heat required to cause a unit rise in the temperature of a unit mass of a given substance

Answer 5

Specific heat

Question 6

What equation is the usual form of the ideal gas law

Answer 6

PV=nRT

Question 7

What type of bond results from the sharing of four electrons

Answer 7

Double bond

Question 8

What term refers to very hard substances, such as diamond, silicon carbide, and quartz, that contain covalent bonds but do not consist of discrete molecules

Answer 8

Covalent networks

Question 9

What is a covalent bond in which the bonding electron pair is pulled closer to the more electronegative element

Answer 9

Polar bond

Question 10

What does the uncertainty principle state about the position and momentum of small particles

Answer 10

Position and momentum cannot b3 precisely measured simultaneously

Question 11

What determines an atoms identity as an element

Answer 11

Number of protons

Question 12

What principle states the elements tend to react chemically to achieve a noble gas electron configuration, whether by losing, gaining, or sharing electrons

Answer 12

Octet rule

Question 13

Characterized by the sharing of one or more electron pairs between two atoms

Answer 13

Covalent bond

Question 14

Type of chemical bond present between atoms in such substances as CaBr2 and NaCl

Answer 14

Ionic bond

Question 15

Characterized by the sharing of valence electrons with many neighboring atoms

Answer 15

Metallic bond

Question 16

Tends to produce solids that are malleable and ductile

Answer 16

Metallic bond

Question 17

Type of chemical bond present between atoms in such substance as NO and CH

Answer 17

Covalent bond

Question 18

Characterized by the transfer of electrons from one atom to another

Answer 18

Ionic bond

Question 19

Type of chemical bond usually formed between a metal and a nonmetal atom

Answer 19

Ionic bond

Question 20

The second law of thermodynamics states that _____ of the universe is always increasing

Answer 20

Entropy

Question 21

A molecule of CO2 in which two polar bonds point symmetrically in opposite directions is ____

Answer 21

Nonpolar

Question 22

What is the speed of light in a vacuum

Answer 22

3.00x10 m/s

Question 23

A solid whose particles are characterized by a regular, repeating, three-dimensional pattern is an _____ solid

Answer 23

Crystalline

Question 24

Atoms that are of the same element but differ in the number of particles in the nucleus are ____

Answer 24

Isotopes

Question 25

Kinetic energy is associated with an objects ____

Answer 25

Motion

Question 26

What is the simplest repeating unit in a crystal?

Answer 26

Unit cell

Question 27

Which of the three main particles that compose the atom has a negative charge

Answer 27

Electron

Question 28

What term refers to a binding situation in which electrons are shared by more than two atoms

Answer 28

Delocalization

Question 29

Which type of chemical formula is the simplest ratio of atoms in a compound

Answer 29

Empirical formula

Question 30

How long is 2.54 cm

Answer 30

25.4 mm

Question 31

In what category are the elements fluorine, bromine, and iodine?

Answer 31

Halogens

Question 32

In what category are th elements magnesium, calcium, and barium?

Answer 32

Alkaline earth metals

Question 33

What type of geometry does acetone (CHO), in which three bonding pairs of electrons are arrayed the central atom, have?

Answer 33

Trigonal planar

Question 34

The ____ law of thermodynamics relates change in internal energy to heat and work

Answer 34

First

Question 35

The ____ theory of light states that the light is electromagnetic waves traveling as bundles or “packets” of energy

Answer 35

Quantum

Question 36

The mass of a substance per unit of volume is called____?

Answer 36

Density

Question 37

A theoretical gas that exactly obeys the assumption of the kinetic theory would be called a ______ gas

Answer 37

Ideal

Question 38

The outermost electrons in an atom, which are involved in chemical bonding, are called _____ electrons

Answer 38

Valence

Question 39

The _____ cubic arrangement of atoms in a crystal has the least empty space of any cubic arrangement

Answer 39

Face-centered